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-rw-r--r--src/o3d/tri_vertex.cpp308
1 files changed, 4 insertions, 304 deletions
diff --git a/src/o3d/tri_vertex.cpp b/src/o3d/tri_vertex.cpp
index bda219a..08f5e7e 100644
--- a/src/o3d/tri_vertex.cpp
+++ b/src/o3d/tri_vertex.cpp
@@ -2,315 +2,15 @@
#include <vector>
#include "math/vector.h"
#include "o3d/vertex_data.h"
+#include "o3d/deriv_vertex.h"
#include "o3d/vertex.h"
-#include "o3d/tri_vertex.h"
+#include "o3d/tri_deriv_vertex.h"
using namespace engine::o3d;
-TriangleVertex3::TriangleVertex3(Vertex3 vertex1, Vertex3 vertex2, Vertex3 vertex3) : vertex1{vertex1}, vertex2{vertex2}, vertex3{vertex3} {
-}
-
-#define P1_OUT 1
-#define P2_OUT 2
-#define P3_OUT 4
-static void _crop_x(std::vector<TriangleVertex3>& tris, TriangleVertex3 t, int n, float x) {
- switch (n) {
- case 0:
- tris.push_back(t);
- break;
- case P1_OUT:
- case P2_OUT:
- case P3_OUT:
- case P2_OUT | P3_OUT:
- case P1_OUT | P3_OUT:
- case P1_OUT | P2_OUT:
- {
- Vertex3* q1;
- Vertex3* q2;
- Vertex3* q3;
- switch (n) {
- case P1_OUT:
- case P2_OUT | P3_OUT:
- q1 = &t.vertex1;
- q2 = &t.vertex2;
- q3 = &t.vertex3;
- break;
- case P2_OUT:
- case P1_OUT | P3_OUT:
- q1 = &t.vertex2;
- q2 = &t.vertex1;
- q3 = &t.vertex3;
- break;
- case P3_OUT:
- case P1_OUT | P2_OUT:
- q1 = &t.vertex3;
- q2 = &t.vertex2;
- q3 = &t.vertex1;
- break;
- }
- engine::math::Vector3 dq2 = q1->point - q2->point;
- float fac2 = (x - q2->point.x) / dq2.x;
- Vertex3 r2{
- {
- x,
- q2->point.y + fac2 * dq2.y,
- q2->point.z + fac2 * dq2.z
- },
- VertexData::lerp(q2->data, q1->data, fac2)
- };
- engine::math::Vector3 dq3 = q1->point - q3->point;
- float fac3 = (x - q3->point.x) / dq3.x;
- Vertex3 r3{
- {
- x,
- q3->point.y + fac3 * dq3.y,
- q3->point.z + fac3 * dq3.z
- },
- VertexData::lerp(q3->data, q1->data, fac3)
- };
- switch (n) {
- case P1_OUT:
- tris.push_back({r3, *q2, *q3});
- tris.push_back({r3, r2, *q2});
- break;
- case P2_OUT:
- tris.push_back({r2, *q3, *q2});
- tris.push_back({r2, r3, *q3});
- break;
- case P3_OUT:
- tris.push_back({r2, *q3, *q2});
- tris.push_back({r2, r3, *q3});
- break;
- case P2_OUT | P3_OUT:
- tris.push_back({*q1, r2, r3});
- break;
- case P1_OUT | P3_OUT:
- tris.push_back({*q1, r3, r2});
- break;
- case P1_OUT | P2_OUT:
- tris.push_back({*q1, r3, r2});
- break;
- }
- }
- break;
- case P1_OUT | P2_OUT | P3_OUT:
- break;
- }
-}
-
-static void _crop_y(std::vector<TriangleVertex3>& tris, TriangleVertex3 t, int n, float y) {
- switch (n) {
- case 0:
- tris.push_back(t);
- break;
- case P1_OUT:
- case P2_OUT:
- case P3_OUT:
- case P2_OUT | P3_OUT:
- case P1_OUT | P3_OUT:
- case P1_OUT | P2_OUT:
- {
- Vertex3* q1;
- Vertex3* q2;
- Vertex3* q3;
- switch (n) {
- case P1_OUT:
- case P2_OUT | P3_OUT:
- q1 = &t.vertex1;
- q2 = &t.vertex2;
- q3 = &t.vertex3;
- break;
- case P2_OUT:
- case P1_OUT | P3_OUT:
- q1 = &t.vertex2;
- q2 = &t.vertex1;
- q3 = &t.vertex3;
- break;
- case P3_OUT:
- case P1_OUT | P2_OUT:
- q1 = &t.vertex3;
- q2 = &t.vertex2;
- q3 = &t.vertex1;
- break;
- }
- engine::math::Vector3 dq2 = q1->point - q2->point;
- float fac2 = (y - q2->point.y) / dq2.y;
- Vertex3 r2{
- {
- q2->point.x + fac2 * dq2.x,
- y,
- q2->point.z + fac2 * dq2.z
- },
- VertexData::lerp(q2->data, q1->data, fac2)
- };
- engine::math::Vector3 dq3 = q1->point - q3->point;
- float fac3 = (y - q3->point.y) / dq3.y;
- Vertex3 r3{
- {
- q3->point.x + fac3 * dq3.x,
- y,
- q3->point.z + fac3 * dq3.z
- },
- VertexData::lerp(q3->data, q1->data, fac3)
- };
- switch (n) {
- case P1_OUT:
- tris.push_back({r3, *q2, *q3});
- tris.push_back({r3, r2, *q2});
- break;
- case P2_OUT:
- tris.push_back({r2, *q3, *q2});
- tris.push_back({r2, r3, *q3});
- break;
- case P3_OUT:
- tris.push_back({r2, *q3, *q2});
- tris.push_back({r2, r3, *q3});
- break;
- case P2_OUT | P3_OUT:
- tris.push_back({*q1, r2, r3});
- break;
- case P1_OUT | P3_OUT:
- tris.push_back({*q1, r3, r2});
- break;
- case P1_OUT | P2_OUT:
- tris.push_back({*q1, r3, r2});
- break;
- }
- }
- break;
- case P1_OUT | P2_OUT | P3_OUT:
- break;
- }
-}
-
-std::vector<TriangleVertex3> TriangleVertex3::crop_xy_out(float x1, float x2, float y1, float y2) const {
- std::vector<TriangleVertex3> tris_final;
- std::vector<TriangleVertex3> tris1;
- _crop_x(tris1, *this, (vertex1.point.x < x1) | ((vertex2.point.x < x1) << 1) | ((vertex3.point.x < x1) << 2), x1);
- for (auto t1 : tris1) {
- std::vector<TriangleVertex3> tris2;
- _crop_x(tris2, t1, (t1.vertex1.point.x > x2) | ((t1.vertex2.point.x > x2) << 1) | ((t1.vertex3.point.x > x2) << 2), x2);
- for (auto t2 : tris2) {
- std::vector<TriangleVertex3> tris3;
- _crop_y(tris3, t2, (t2.vertex1.point.y < y1) | ((t2.vertex2.point.y < y1) << 1) | ((t2.vertex3.point.y < y1) << 2), y1);
- for (auto t3 : tris3)
- _crop_y(tris_final, t3, (t3.vertex1.point.y > y2) | ((t3.vertex2.point.y > y2) << 1) | ((t3.vertex3.point.y > y2) << 2), y2);
- }
- }
- return tris_final;
-}
-#undef P1_OUT
-#undef P2_OUT
-#undef P3_OUT
-
TriangleVertex4::TriangleVertex4(Vertex4 vertex1, Vertex4 vertex2, Vertex4 vertex3) : vertex1{vertex1}, vertex2{vertex2}, vertex3{vertex3} {
}
-TriangleVertex4::TriangleVertex4(TriangleVertex3 triangle) : vertex1{triangle.vertex1}, vertex2{triangle.vertex2}, vertex3{triangle.vertex3} {
-}
-
-#define P1_OUT 1
-#define P2_OUT 2
-#define P3_OUT 4
-static void _crop_z(std::vector<TriangleVertex4>& tris, TriangleVertex4 t, int n, float z) {
- switch (n) {
- case 0:
- tris.push_back(t);
- break;
- case P1_OUT:
- case P2_OUT:
- case P3_OUT:
- case P2_OUT | P3_OUT:
- case P1_OUT | P3_OUT:
- case P1_OUT | P2_OUT:
- {
- Vertex4* q1;
- Vertex4* q2;
- Vertex4* q3;
- switch (n) {
- case P1_OUT:
- case P2_OUT | P3_OUT:
- q1 = &t.vertex1;
- q2 = &t.vertex2;
- q3 = &t.vertex3;
- break;
- case P2_OUT:
- case P1_OUT | P3_OUT:
- q1 = &t.vertex2;
- q2 = &t.vertex1;
- q3 = &t.vertex3;
- break;
- case P3_OUT:
- case P1_OUT | P2_OUT:
- q1 = &t.vertex3;
- q2 = &t.vertex2;
- q3 = &t.vertex1;
- break;
- }
- engine::math::Vector4 dq2 = q1->point - q2->point;
- float fac2 = (z - q2->point.z) / dq2.z;
- Vertex4 r2{
- {
- q2->point.x + fac2 * dq2.x,
- q2->point.y + fac2 * dq2.y,
- z,
- q2->point.w + fac2 * dq2.w
- },
- VertexData::lerp(q2->data, q1->data, fac2)
- };
- engine::math::Vector4 dq3 = q1->point - q3->point;
- float fac3 = (z - q3->point.z) / dq3.z;
- Vertex4 r3{
- {
- q3->point.x + fac3 * dq3.x,
- q3->point.y + fac3 * dq3.y,
- z,
- q3->point.w + fac3 * dq3.w
- },
- VertexData::lerp(q3->data, q1->data, fac3)
- };
- switch (n) {
- case P1_OUT:
- tris.push_back({r3, *q2, *q3});
- tris.push_back({r3, r2, *q2});
- break;
- case P2_OUT:
- tris.push_back({r2, *q3, *q2});
- tris.push_back({r2, r3, *q3});
- break;
- case P3_OUT:
- tris.push_back({r2, *q3, *q2});
- tris.push_back({r2, r3, *q3});
- break;
- case P2_OUT | P3_OUT:
- tris.push_back({*q1, r2, r3});
- break;
- case P1_OUT | P3_OUT:
- tris.push_back({*q1, r3, r2});
- break;
- case P1_OUT | P2_OUT:
- tris.push_back({*q1, r3, r2});
- break;
- }
- }
- break;
- case P1_OUT | P2_OUT | P3_OUT:
- break;
- }
-}
-
-std::vector<TriangleVertex4> TriangleVertex4::crop_z_out(float z1, float z2) const {
- std::vector<TriangleVertex4> tris;
- _crop_z(tris, *this, (vertex1.point.z < z1) | ((vertex2.point.z < z1) << 1) | ((vertex3.point.z < z1) << 2), z1);
- std::vector<TriangleVertex4> tris2;
- for (auto t : tris)
- _crop_z(tris2, t, (t.vertex1.point.z > z2) | ((t.vertex2.point.z > z2) << 1) | ((t.vertex3.point.z > z2) << 2), z2);
- return tris2;
-}
-#undef P1_OUT
-#undef P2_OUT
-#undef P3_OUT
-
-TriangleVertex3 TriangleVertex4::div_by_w() const {
- return {vertex1.div_by_w(), vertex2.div_by_w(), vertex3.div_by_w()};
+TriangleDerivedVertex4 TriangleVertex4::to_derived() const {
+ return {{vertex1.point, 1.f, 0.f}, {vertex2.point, 0.f, 1.f}, {vertex3.point, 0.f, 0.f}};
}
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